let i, j be Instruction of SCM+FSA ; :: thesis: for a being Int-Location st not i destroysdestroy a & not j destroysdestroy a holds
not i ';' j destroysdestroy a
let a be Int-Location ; :: thesis: ( not i destroysdestroy a & not j destroysdestroy a implies not i ';' j destroysdestroy a )
assume that
A1: not i destroysdestroy a and
A2: not j destroysdestroy a ; :: thesis: not i ';' j destroysdestroy a
A3: not Macro j destroysdestroy a by A2, Th77;
not Macro i destroysdestroy a by A1, Th77;
hence not i ';' j destroysdestroy a by A3, Th81; :: thesis: verum